Here's the proper way to delete the Windows.old and $Windows.BT folders: 1  Click Start and type in disk cleanup (no quotes). Wait for the Disk Cleanup utility to show up in the Start menu and click it. 2  A window will appear asking you which hard drive you want to clean up. Choose the C drive (which is default) and click OK.
The A-and B-type HCs are very similar in appearance in the rabbit retina too. Other species may have more than two types of horizontal cell and often these other types are concerned with color coding (see chapter on Horizontal cells by Perlman et al., webvision).
Other cell types are present in the retina as well. The retina is perfused by blood vessels which form three layers (plexi). Two of the vascular plexi are deep inside the retina and one is near the inner surface of the retina (Figure 1). These vessels are made up of vascular endothelial cells and mural cells.